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PX5524 4 x 4 Gb/s TIA/LA Receiver Product Brief
April 2006
Description The growing use of the Internet has created increasingly higher demand for multi-Gb/s I/O performance. The demand for 40+ Gb/s WAN bandwidth fuels the growth of short-reach 10 Gb/s infrastructures within high-end telco and datacom routers, switches, servers and other proprietary chassis-to-chassis links. The Zarlink PX5524 4 Gb/s TIA/LA Receiver is a four-channel TIA/LA optical receiver designed for various 4x4 Gb/s parallel optics and CWDM PMD applications. It consists of a DC-coupled transimpedance amplifier and an AC-coupled differential limiting amplifier. The transimpedance amplifier achieves a nominal 3 GHz bandwidth over a wide range of photodiode input capacitance. Excellent channelto-channel isolation ensures data integrity at the receiver sensitivity limits. A global signal detect circuit provides the photodiode reverse bias voltage supply and senses average photocurrent supplied to the photodiode array. The transimpedance amplifier is AC-coupled internally to a high-gain, high-bandwidth differential limiting amplifier. The limiting amplifier provides a differential back-terminated CML output that can be used to drive 4 Gb/s per channel transceivers or other CML compatible clock and data recovery circuits. The limiting amplifier features an adjustable signal detect circuit that senses optical modulation amplitude (OMA) to provide a received signal indication for each channel.
Features * * * * * * 4-channel integrated transimpedance and liming amplifier operates up to 4.25 Gb/s 8 uAPP receiver sensitivity for 10-12 BER Single +3.3V supply dissipating 105 mW per channel Individual channel signal detect compares input signal strength (OMA) with adjustable threshold Global signal detect compares quiescent photocurrent with adjustable threshold Squelch automatically disables output when input signal strength falls below programmable threshold Serial digital interface for controlling channel enable and signal detect features Reconfigurable I/O provides access to serial digital interface and dedicated channel signal detect outputs 250-micron channel pitch matches optical ribbon fiber and photodiode arrays
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Applications * * * * 10GbE LX-4 optical modules 4-lane 4GFC, OC-48 VSR, InfinibandTM parallel optical modules Proprietary parallel optical modules and CWDM Proprietary 4-lane intra-system parallel optics
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Zarlink Semiconductor Inc.
PX5524
Figure 1: Representative electrical data pattern from the PX5524 IC output. Input OMA of -14.5 dBm received through a commercially-available photodiode at 3.0 Gb/s with a PRBS23 pattern.
Product Brief
Figure 2: Application block diagram utilizing the PX5514 VCSEL driver and the PX5524 optical receiver
PX5514
50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms MICRO CONTROLLER 2-Wire Interface DATA DATA CLK STB 4-Wire Interface TX_IN0_P TX_IN0_N TX_IN1_P TX_IN1_N GND TX_IN1_P TX_IN1_N GND TX_IN3_P TX_IN3_N GND D_IN D_OUT CLK STB TX_OUT3 TX_OUT2 TX_OUT0 GND TX_OUT1
TX Data
Optical Fiber
DATA CLK
OPTIONAL MICRO CONTROLLER 2-Wire Interface DATA DATA CLK STB
4-Wire Interface
PX5524
D_IN D_OUT CLK STB RX_OUT0_P RX_OUT0_N RX_IN0 RX_OUT1_P RX_OUT1_N RX_OUT2_P RX_OUT2_N RX_OUT3_P RX_OUT3_N RX_IN3 RX_IN2 DET_BIAS3 RX_IN1 DET_BIAS2 DET_BIAS1 DET_BIAS0
DATA CLK
50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms 50 Ohms
RX Data
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Zarlink Semiconductor Inc.
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Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

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